Deep Sky Object in Spring
M3 (Globular Cluster in Canes Venatici)
|Date & Time: ||Jan 23 2015, from 28:42 to 29:14 JST(+0900)
|Composed 6shots with 4min. & 6shots with 30sec. exposed|
|Optical: ||Meade 25cm(10") Schmidt-Cassegrain with a conversion lens (f=1600mm, F6.3)
|with BaaderPlanetarium Moon&Skyglow filter|
|Auto-guided with Meade LX200 Equatorial & Pictor 201XT
|Digital Camera: ||Canon EOS 600D (Remodeled)
|Location: ||Ooizumi, Hokuto city, Yamanashi pref.
|Camera Settings: ||Recording format...14bit CCD-RAW, converted to 16bit TIFF(5184×3456)|
At about the zenith in spring night sky, we can see a wonderful globular cluster roughly halfway between Cor Caroli
(alpha Canum Venaticorum) and Arcturus in Bootes.
But you'll need a large scope to resolve its individual stars.
|M3 (NGC5272) / Globular Cluster, type VI|
|R.A.||13h 42m 12.0s (2000.0)|
|Dec.||+28° 23' 00" (2000.0)|
|Real Size||114 light yrs.|
|Distance||45,000 light yrs.|
The cluster is about 45,000 light years away.